// Before Beeching one could afford to take the train to almost every city, town or hamlet in the British Isles, and at times one could, if they so wished, enjoy the benefit of a private carriage, all to one's self.
What have we today fares where in some cases it is cheaper to fly, and unless one books a seat in advance, one can be forced to stand in packed carriages throughout their entire journey. //
Several points in there...
British Rail cost the taxpayers a great deal of money. You could afford to travel everywhere cheaply (not sure that is true) because the fares did not cover the running costs. Non rail users were subsidising rail travellers. We do not want to go back to that situation.
Even in British Rails heyday, a carriage to oneself would have been very rare, and would have been to somewhere off the beaten track and off peak.
Beeching closed many routes to save money (and the rest of the network). It is clear that he went too far, as some routes have re-opened, but re-nationalisation would not result in an expanded rail network.
Crowded trains now are a consequence of success. We are moving more passengers now than ever before. And we cannot literally fit more trains on the busiest routes.
Increase in rail passenger useage.
https://gohs2.files.wordpress.com/2012/07/4-passenger-figures-1923-2013.jpg
At the moment we have the best of both worlds. A Nationalised (in all but name) Network. Railtrack is owned by the Government and run as a not for profit business. And franchised private rail companies, competing for routes. It is a win-win set up.